my supplier did not upload the invoice for the purchase I made , his invoice wasn't reflecting in GSTR2 . I have filled my gstr1 and gstr3b. is der anyway that I can file it in GSTR2a and claim the tax that I have paid .
Yes you can upload invoice in gstr 2a and take provisional credit and it will shown in gstr 1a to your supplier and if you supplier will not accept the invoice than the liability will be added in your outward supply and you have to pay tax with interest .